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DATA SHEET AVA 22 AUDIO/ ALIGNMENT DELAY

8.0 9.5

General Description The Rane AVA 22 Audio/Video Alignment Delay is a A recessed rear panel switch is available for locking out fully balanced two Input, two Output audio alignment delay front panel controls. In this mode, all of the front panel providing a range of 0.0 to 9.5 NTSC frames (8.0 PAL/ pushbuttons are disabled with the exception of the Recall SECAM frames) on each Output. The Delay of each Output is buttons. The Recall buttons remain active so the user may independently adjustable in (half-frame) increments. view the stored Delay values without risk of changing them. Each Output has two nonvolatile Memories, A and B, for easy Internal jumpers enable or disable Bypass while in Front access to previously stored Delay values. Panel Lockout mode. The default setting of these jumpers The AVA 22 features XLR connectors. Remote terminals disables Bypass in Front Panel Lockout mode. on the rear accept external configuration switches, permitting Independent bypass relays provide a fail safe, hard-wired independent stereo bypassing and stereo remote recall of bypass in case of power loss. Memories. An internal jumper is provided to reconfigure the The AVA 22 is a unity gain device with Sensitivity Remote terminals for independent recall of the two Channels’ adjustment controls to provide proper internal levels for the stored Memories. Dolby™ Time Link circuit. If the input signal is nominally Housed in a single rack space the AVA 22 can be oper- +4 dBu, set the Sensitivity control fully counter-clockwise ated as two independent Channels (dual mono) or as a stereo (+4 dBu). For those unable to touch a cable and determine its pair of Channels (LINK mode). signal level, Signal present and Clip LEDs provide visual The AVA 22 employs the Dolby™ Time Link 1-bit delta- indication that the Input signal is within optimal range. sigma encode/decode circuit; the same circuit used in many Powered from a low voltage UL listed, CSA certified Dolby decoding units for home theater remote power supply (230 VAC model meets LVD 73/23/ systems. This ensures the highest possible audio quality EEC), the AVA 22 is exempt from safety agency require- throughout the system. ments, and may be used in any installation mandating agency Both NTSC and PAL/SECAM broadcast standards are compliance. supported. Dolby and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

Features • 1-Bit Dolby™ Time Link Conversion • Independent Remote Memory Recall Interface on Rear • Two Independent Channels (2 In - 2 Out) • Active Balanced XLR Inputs & Outputs • 0 to 9.5 NTSC Frames Delay Range per Channel • Two EEPROM Memories per Channel (No Batteries) • 0 to 8.0 PAL/SECAM Frames Delay Range per Channel • Fail-Safe Bypass for Each Channel • Single Field (Half-Frame) Increments • UL/CSA Remote Power Supply (120 VAC) • Front Panel Lockout Switch on Rear • CE (Low Voltage & EMC) Remote Power Supply (230 VAC)

Data Sheet-1 Parameter Specification Limit Units Conditions/Comments Delay Range NTSC 0.0 to 9.5 1% frames 33.3 msec/frame (30 frames/sec) ...... PAL/SECAM 0.0 to 8 1% frames 40 msec/frame (25 frames/sec) ...... Increment Size 1 Field (½ Frame) ...... Readout 2 digit LED Propagation Delay 11.3 0.1 µsec Sampling Frequency 3.2 MHz Data Convertion 1-bit Dolby™ Time Link Input & Output Connectors XLR Inputs: Type Active Balanced Instrumentation type ...... Impedance 20k Balanced 1% ohms ...... Headroom 16 above Sensitivity setting 2 dB 20 Hz-8 kHz 7 above Sensitivity setting 2 dB 20 kHz ...... Max Nominal Level 4 dBu 20-8 kHz, Sens@+4 dBu Outputs: Type Active Balanced ...... Impedance 200 Balanced 1% ohms ...... Max Voltage Level 20 (=>600 ohm load) dBu 20 Hz - 8 kHz, Sens@+4 dBu 12 dBu at 20 kHz, Sens@+4 dBu ...... Nominal Output Power 4 dBm 600 ohm load Overall System Gain 0 ±1 dB 600 ohm load 2.5 ±1 dB >2k ohm load Output Relays Yes Auto-Bypass with power loss LED Threshold - Clip 5 before Converter Overload 1 dB 1 kHz LED Threshold - Signal -37 below Clip LED 1 dB 1 kHz Present Frequency Response 20-8 kHz ±0.5 dB +4 dBu, Sens@+4 8k-20 kHz ±1.5 dB +4 dBu, Sens@+4 THD + 0.1 .05 % +4 dBu, Sens@+4, 1 kHz, 30k BW 0.2 .1 % +4 dBu, Sens@+4, 20-20k, 30k BW Signal-to-Noise Ratio 92 2 dB +4 dBu, Sens@+4, CCIR-2k 82 2 dB +4 dBu, Sens@+4, 20-20 kHz Dynamic Range 98 2 dB Sens@+4, 20 Hz-8 kHz 90 2 dB Sens@+4, 8k-20 kHz 108 2 dB Sens@+4, 20-20 kHz, CCIR-2k Crosstalk >85 @ 1 kHz, >64 @ 20 kHz dB +4 dBu, Sens@+4 Power Supply Requirement 18 VAC w/center tap 10% Vrms RS 1 (supplied) Maximum Current Demand 650 mA RMS current from remote supply Unit: Agency Listing ...... 120 VAC model Class 2 Equipment National Electrical UL & CSA Exempt Class 2 equipment ...... 230 VAC model CE-EMC EMC directive 89/336/EEC CE-Safety Exempt per Art. 1, LVD 73/23/EEC EMI/RFI Emission Level Certified FCC Part 15J Class A Device Power Supply: Agency Listing Class 2 Equipment ...... 120 VAC model UL File no. E88261 CSA File no. LR58948 ...... 230 VAC model CE-EMC EMC directive 89/336/EEC CE-Safety LV directive 73/23/EEC ...... 100 VAC model Built to JIS only Unit: Construction All Steel ...... Size 1.75"H x 19"W x 8.5"D (1U) (4.4 cm x 48.3 cm x 21.6 cm) ...... Weight 6 lb (w/o power supply) (2.7 kg) Shipping: Size 4.5" x 20.3" x 13.75" (11.5 cm x 52 cm x 35 cm) ...... Weight 10 lb (4.5 kg) Note: 0 dBu = 0.775 Vrms Data Sheet-2 Block Diagram

Application Information The AVA 22 provides a cost-effective solution to the The AVA 22 operates as either a dual mono or stereo problem of aligning audio to video in broadcast. Modern device. Link mode provides simple stereo operation, linking creates unavoidable time delays between both Channels together with easy one-button editing of both audio and video signals. Accumulated delays can run as high Channels’ parameters. In dual mono the two Channels are as several frames, creating objectionable synchronization completely independent allowing simultaneous operation in problems. Audio preceding video by even one frame is two separate mono production rooms. The Remote Recall detectable by some people. The high cost of existing audio/ terminals can be internally configured allowing the remote video synchronizers prevents many broadcasters from room to independently access the two configuration memories. correcting all synchronization problems adequately. Satellite The AVA 22 supports both NTSC and PAL/SECAM links also add to the synchronization problem since the audio broadcast modes. This broadcast Mode is stored in configura- can be transmitted through a separate medium than the video. tion memory with the delay values allowing recall of NTSC The AVA 22’s maximum delay of 9.5 NTSC (8.0 PAL/ values from one memory and PAL/SECAM values from the SECAM) frames provides these complex systems with a cost other. Video houses providing NTSC to PAL (and vice versa) effective delay solution. Rane offers the AVA 22 to answer conversion find this feature particularly useful. (Those the need for a low cost, high quality, audio/video alignment working on Godzilla sequels should contact the factory for delay. special synchronization procedures.)

600 ohm user information The AVA 22’s inputs are specified for a nominal +4 dBu input, which is a voltage referenced level of 1.228 Volts RMS. (0 dBu = 0.7746 Volts). At this voltage level, the AVA 22 provides 16 dB of headroom below 8 kHz. Users who wish to operate the AVA 22 in 600 ohm systems must provide their own 600 ohm input resistor across the input terminals. This enables the AVA 22 to accept a +4 dBm input and allows delivery of +4 dBm to a 600 ohm load. Confusion among 600 ohm users of the AVA 22 may occur if one assumes the input and output impedances of the AVA 22 are 600 ohms – they are not. Therefore, when evaluating the AVA 22 do not assume that +4 dBm equals +4 dBu unless you have ensured that all input and output impedances in your test setup are 600 ohms. Advantages of Hi-Z in/Lo-Z out systems: (from Audio System Design and Installation, by Phillip Giddings, Howard W. Sams, 1990, pp. 129-130.) 1. Less in output due to smaller output current needs. 2. About 14 dB lower noise pickup by interconnecting lines due to lower source impedance. 3. Greater lengths of cable may be driven for a given high frequency roll-off. 4. Many pieces of equipment can be driven from one output without the use of distribution and with no concern for matching or level changes. 5. Better reliability resulting from less heat generation due to less power drawn from the output stage. 6. In the event that a 600 ohm load termination is used the delivered voltage will only drop by about 1 dB (20 log [R1/(R1+RS)]. 7. Greater signal voltage swing as 6 dB of signal is not lost in the (600 ohm) source impedance. 8. Smaller currents reduce inductive coupling and crosstalk between cables. Data Sheet-3 AVA 22 AUDIO/VIDEO ALIGNMENT DELAY

Rear Panel

Architectural Specifications Independent input-output Sensitivity controls shall be The digital audio delay unit shall be a single rack space, included to allow calibration of the input signal for maximum two Input, two Output configuration. The delay adjustment performance. The inputs and outputs shall be active balanced, range shall be from 0.0 to 9.5 NTSC frames (8.0 PAL/ terminated with XLR connectors. Each channel shall have SECAM frames), adjustable via increment/decrement LEDs to indicate Signal present and input/output Clip pushbuttons, in field (half-frame) intervals. The method of conditions. delay shall be the Dolby Time Link 1-bit delta-sigma encode/ The unit shall provide independent, fail-safe Bypass decode circuit. Independent remote recall terminals shall be relays requiring no power to engage. RFI filters shall also be provided for external stereo bypassing and stereo recall of provided. stored configuration memories, two per channel. A two (2) The unit shall have certified compliance with FCC docket digit LED display shall indicate delay values in frames as well 20780 Part 15J for Class A computing devices, and EMCD as software revision level. For each channel, individual LEDs 89/336/EEC. The 120 VAC model shall be powered from a shall indicate Bypass status, current Memory, broadcast Mode UL listed, CSA certified remote power supply; the 230 VAC (NTSC or PAL/SECAM) and overall Link status. model shall be powered from a remote power supply meeting A recessed rear-panel switch shall disable the front panel, LVD 73/23/EEC & EMCD 89/336/EEC standards. The yet still allow viewing of stored delay values. chassis shall be constructed entirely from cold-rolled steel. The unit shall be a Rane Corporation AVA 22.

©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL (425)355-6000 (425)347-7757 WEB http://www.rane.com Data Sheet-4 All features & specifications subject to change without notice. DOC 103109 PN 08592 8-98